ON EOSSIL rOLYZOA. 



<o 



Crisixa. 



7. ,, serrata, G. & H., Santa Barbara. 



Cavea, D'Orb. 



8. „ prisca, G. & H. 



LlCHENOPORA, Def. 



',». ,, CALIFORXKA, „ „ 



MCXTICEESCIS, D'Orb. 



10. „ tobtilis, G. & H. = ? Heteropora ibid., Lonsd, 



'Tertiary Polyzoa,' Dr. August Goldfnss ('Petrcfacta Germanica'). 



The Tertiary Polyzoa described and figured by Goldfuss are few in 

 number, but bis species have been adopted, re-described, or referred to by 

 every author who has taken up the study as a speciality. 



Cheilostomata. 



' Eocene Polyzoa, British.' 



The almost barren record of British Eocene Polyzoa has been remarked 

 upon by previous authors, but I am afraid that we owe the barrenness to 

 the want of research rather than to the scarcity of species. Mr. Busk 

 describes three species from the London Clay at Highgate, found in the 

 collection of Mr. Wetherell, 'Geo. Mag.' vol. iii., July 1866: — 



1. Membranifora Laceoixii? pi. xii. fig. 1. 



2. BtFLUSTRA EOCENA, Busk, pi. xii. fig. 2. 



3. Dittosaeia Wetheeelli, Busk, pi. xii. fig. 3 (Gejiellaeiad^:, Busk). 



The Membranipora described by Mr. Busk is rather more linear than the 

 more recent form generally met with round our coast ; but some time 

 since Professor Judd ' sent me a specimen of what I consider to be refer- 

 able to the J\L Lacroixii, and this was from the oyster beds of Colwell Bay. 

 It differed from Mr. Busk's figured specimen, but as the species varies 

 very much in habit, this I considered of but small consequence. The 

 value of the specimen sent was this. When the cells separated in the 

 line with the side walls I was able to detect the ' Rosettenplatte ' or 

 communication pores through which the endosarcal cord passed from 

 cell to cell. These were three in number on the side walls, and they 



1 Discovered by his assistant. 



